mineral

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: yellowish-brown to tan; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: None (Conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: yellowish-brown to tan
Luster: Vitreous (glassy)

Identified May 24, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: yellowish-brown to tan; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: None (Conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed in igneous, metamorphic, and sedimentary environments through hydrothermal activity or crystallization from magma. Color often comes from iron impurities or radiation.

Uses & applications

Used in glassmaking, electronics (piezoelectric properties), jewelry, and as a popular healing crystal or collector specimen.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Citrine is often referred to as the 'Success Stone'.

Field identification & locations

Identify by its ability to scratch glass and lack of cleavage. Found globally in riverbeds, mountains, and geodes.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

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Mineral/Rock

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Metamorphic Rock

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mineral